If you're using Debian, be sure that the correct Perl is used, there is a known issue:

Try to locate the file using:
[tt]locate DB.pm[/tt]
when located, try to copy the files to the Path used by your OS (if PandoraFMS/BD.pm is in /usr/local/share/perl/5.10.0, as your system is using /usr/local/share/perl/5.10.1, you can do